adams



(No Model.)

A. D. & F. L. ADAMS. BOLT.

No. 460,191. I Patented Sept. 29, 1891.

' ii ll|llllllllllllllllllllllli \M i dire QZOZ Jim UNITED STATES PATENTOFFICE.

ARCHIBALD D. ADAMS AND FRED. L. ADAMS, OF PROPIIETSTOIVN, ILLINOIS.

SPECIFICATION forming part of Letters Patent N 0. 460,191, datedSeptember 29, 1891. Application filed February '75 1891. Serial No.380,585. (No model.)

T to whom, it may concern:

Be it known that we, AROHIBALD D. ADAMS and FRED. L. ADAMS, citizens ofthe United States,residingat Prophetstown, in the county of WVhitesideand State of Illinois, have invented a new and useful Door-Lock, ofwhich the following is a specification.

This invention relates to door-locks, and has for its objects theimprovement of the [0 same in the matters of durability, cheapness,

and security.

With these objects in view the invention resides in the various noveldetails of construction and in the combination of parts hereinafterfully described, and particularly pointed out in the claims.

I11 the drawings, in which we have illustrated our invention and inwhich like letters of reference indicate corresponding parts, Figure 1shows a perspective view of a stabledoor provided with our improvedlock. Fig. 2 is a side elevation of the lock, the front plate havingbeen removed. Fig. 3 is a detail perspective View of the keeper-plate,and Fig. 4 is a View, partly in section, of a door.

In the drawings, the letter A designates a casing or door-opening, toone side of which is hinged the door B. To the casing on the sideopposite to which the door B is hinged 0 are fastened the hasps a a,which extend out from said casing adistance equal to the thickness ofthe door, or rather a distance equal to that level within or Without thedoor upon which the bolts of the lock work.

0 indicates the lock, and D the keeper plates, which are necessaryadjuncts to the lock on account of its peculiar construction. The lock 0is provided with a case E.

F F designate the lock-bolts, which extend from the case E to thekeeper-plates D. The

bolt F is provided with a shoulder f near one end and with a loosecollar f between that end and the case E. Between the collar f and theshoulder f there is a coiled spring 5 surrounding the bolt, which tendsnormally to press the bolt outward. Both bolts F F extend within thecasing and are attached therein to frames f f These frames f and f arecounterparts of each other in every particular. They are both in shaperectangular parallelograms and are both toothed upon one sideinteriorly, for a purpose to be pointed out. Each one of these frames isprovided with a lug f to which the bolts are attached, the onlydifference in the two cases being that the lug upon the frame, which isconnected to the upper bolt, is upon the same side with the teeth,whereas the lug, which is connected to the frame to which the lower boltis joined, is upon the side of the frame opposite to that which istoothed.

G' indicates a small cog-wheel, which is fast upon a shaft g, journaledin the case E and having upon its outer end a knob g. The cog-wheel Gfits within the two frames f and f intermeshing with the toothed sidesof both.

In putting the lock together the frames f and f are placed in suchposition as they will hold when the bolts F and F are thrust outward totheir greatest extent. Gis then placed within the frames f and f and bysuch position its teeth will be intermeshed with the toothed sides ofthese frames. The collar f will rest against the outside of the case E,and upon the turning of the knob g the frames will be retracted towardeach other, therebydrawing in the bolts F F, and in so doing cramp thespring between the should er f and the collar f. It will be evident thatas soon as the pressure upon the knob is released the spring will pushthe bolt F away from the case, and in so doing will cause the frame f toresume the position originally occupied. As the frame f moves to itsnormal position under impulse from the coiled spring, as abovedescribed, it will cause the cog-wheel G to revolve, and as this meshesnot only with the frame f but also with the frame f and the teeth inthese frames being arranged on opposite sides, the revolution of thesaid cogwheel will cause the framef to resume its normal position and inso doing to thrust the bolt F outward from the case.

The keeper-plates D D are located over the perforations b, which areprovided in the door B for the purpose of enabling the hasps a a toextend through said door. The keeperplate D is provided with a slot d,with a guideloop (1, Within which the bolt F is allowed reciprocatingmotion. The keeper-plate D is provided with a slot 61, similar to thatin the keeper-plate D and for a similar purpose that is, for the purposeof receiving the hasp 7 I The cog-wheel pressed catch d will cover theslot (1 and be,

in line with the opening of the guide-loop d,

so that when the pressure upon the knob has been released and thespring-actuated bolt F tends to thrust forward the said springactuatedbolt 1 will be restrained from motion by its end resting against theside of the catch 01 It will also be evident that upon the mere act ofclosing the door the bolts will thrust forward, as the said act ofclosing the door will cause the hasps a to project through the openingsb and through the slots d, and in so doing to lift the catch 01 thusreleasing the bolts and locking the door.

From the foregoing description it will be quite evident that thisinvention is a great improvement in door-locks, and especially in caseswhere a strong automatic lock is not only desirable but necessary.

We have illustrated the invention as applied to a stable-door, and itsefficacy in this position will be apparent; but it may be applied invarious other places with advantage.

Having thus described our invention, what we claim, and desire to secureby Letters Patent, is-

1. In a door-locking mechanism, the combination, with theoppositely-acting bolts F F, the bolt F being provided with a shoulder fand a loose collar f and a spring coiled upon the bolt between saidshoulderand collar, of casing E, the rectangular frames f f arrangedwithin the casing in such manner that they are allowed a slightreciprocating motion upon'each other, the said frames f f having theirinner sides toothed, and a cogwheel G, fast upon a shaft g, providedwith a knob g and meshing with the teeth of the frames, substantially asand for the purpose set forth.

2. In a door-locking mechanism, the com bination, with theoppositely-acting bolts F F, one of which is spring-actuated, of theeasing E, the rectangular frames f f arranged within the casiu g insuchmannerthat they are allowed a slight reciprocating motion upon eachother,vthe said frames f f having their inner sides toothed, a cog-wheelG, fast upon a shaft g, provided with a knob g and meshing with theteeth of the frames, the staples a, the keeper-plates D D, and aspringpressed pivoted catch (1 in line with the bolt F, substantially asand for the purpose set forth.

In testimony that we claim the foregoing as our own we have heretoaffixed our signatures in presence of two witnesses.

AROI-IIBALD D. ADAMS. FRED. L. ADAMS.

Witnesses:

WALTON D. SMITH, ASA W. OoNNER.

